干旱区生态环境知识资源中心(Arid): 3+2+X : what is the most useful depolarization input for retrieving microphysical properties of non-spherical particles from lidar measurements using the spheroid model of Dubovik et al. (2006)?

Arid

DOI	10.5194/amt-12-4421-2019
	3+2+X : what is the most useful depolarization input for retrieving microphysical properties of non-spherical particles from lidar measurements using the spheroid model of Dubovik et al. (2006)?
	Tesche, Matthias 1,5; Kolgotin, Alexei 2; Haarig, Moritz 3; Burton, Sharon P.4; Ferrare, Richard A.4; Hostetler, Chris A.4; Muller, Detlef 1
通讯作者	Tesche, Matthias
来源期刊	ATMOSPHERIC MEASUREMENT TECHNIQUES
ISSN	1867-1381
EISSN	1867-8548
出版年	2019
卷号	12 期号:8 页码:4421-4437
英文摘要	The typical multiwavelength aerosol lidar data set for inversion of optical to microphysical parameters is composed of three backscatter coefficients (beta) at 355, 532, and 1064 nm and two extinction coefficients (alpha) at 355 and 532 nm. This data combination is referred to as a 3 beta + 2 alpha or 3 + 2 data set. This set of data is sufficient for retrieving some important microphysical particle parameters if the particles have spherical shape. Here, we investigate the effect of including the particle linear depolarization ratio (delta) as a third input parameter for the inversion of lidar data. The inversion algorithm is generally not used if measurements show values of delta that exceed 0.10 at 532 nm, i.e. in the presence of non-spherical particles such as desert dust, volcanic ash, and, under special circumstances, biomass-burning smoke. We use experimental data collected with instruments that are capable of measuring delta at all three lidar wavelengths with an inversion routine that applies the spheroidal light-scattering model of Dubovik et al. (2006) with a fixed axis-ratio distribution to replicate scattering properties of non-spherical particles. The inversion gives the fraction of spheroids required to replicate the optical data as an additional output parameter. This is the first systematic test of the effect of using all theoretically possible combinations of delta taken at 355, 532, and 1064 nm as input in the lidar data inversion. We find that depolarization information of at least one wavelength already provides useful information for the inversion of optical data that have been collected in the presence of non-spherical mineral dust particles. However, any choice of delta(lambda) will give lower values of the single-scattering albedo than the traditional 3 + 2 data set. We find that input data sets that include delta(355) give a spheroid fraction that closely resembles the dust ratio we obtain from using beta(532) and delta(532) in a methodology applied in aerosol-type separation. The use of delta(355) in data sets of two or three delta(lambda) reduces the spheroid fraction that is retrieved when using delta(532) and delta(1064). Use of the latter two parameters without accounting for delta(355) generally leads to high spheroid fractions that we consider not trustworthy. The use of three delta(lambda) instead of two delta(lambda), including the constraint that one of these is measured at 355 nm does not provide any advantage over using 3 + 2 + delta(355) for the observations with varying contributions of mineral dust considered here. However, additional measurements at wavelengths different from 355 nm would be desirable for application to a wider range of aerosol scenarios that may include non-spherical smoke particles, which can have values of delta(355) that are indistinguishable from those found for mineral dust. We therefore conclude that - depending on measurement capability - the future standard input for inversion of lidar data taken in the presence of mineral dust particles and using the spheroid model of Dubovik et al. (2006) might be 3 + 2 + delta(355) or 3 + 2 + delta(355) + delta(532).
类型	Article
语种	英语
国家	England ; Russia ; Germany ; USA
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:000481989400001
WOS关键词	SPECTRAL-RESOLUTION LIDAR ; MULTIWAVELENGTH RAMAN LIDAR ; SAHARAN DUST AEROSOLS ; OPTICAL-PROPERTIES ; VERTICAL PROFILES ; COARSE DUST ; INVERSION ; RATIO ; SMOKE ; BACKSCATTER
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214515
作者单位	1.Univ Hertfordshire, Sch Phys Astron & Math, Hatfield, Herts, England; 2.AM Prokhorov Gen Phys Inst, Moscow, Russia; 3.Leibniz Inst Tropospher Res TROPOS, Leipzig, Germany; 4.NASA, Langley Res Ctr, Hampton, VA 23665 USA; 5.Univ Leipzig, LIM, Leipzig, Germany
推荐引用方式 GB/T 7714	Tesche, Matthias,Kolgotin, Alexei,Haarig, Moritz,et al. 3+2+X : what is the most useful depolarization input for retrieving microphysical properties of non-spherical particles from lidar measurements using the spheroid model of Dubovik et al. (2006)?[J],2019,12(8):4421-4437.
APA	Tesche, Matthias.,Kolgotin, Alexei.,Haarig, Moritz.,Burton, Sharon P..,Ferrare, Richard A..,...&Muller, Detlef.(2019).3+2+X : what is the most useful depolarization input for retrieving microphysical properties of non-spherical particles from lidar measurements using the spheroid model of Dubovik et al. (2006)?.ATMOSPHERIC MEASUREMENT TECHNIQUES,12(8),4421-4437.
MLA	Tesche, Matthias,et al."3+2+X : what is the most useful depolarization input for retrieving microphysical properties of non-spherical particles from lidar measurements using the spheroid model of Dubovik et al. (2006)?".ATMOSPHERIC MEASUREMENT TECHNIQUES 12.8(2019):4421-4437.